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The skin and other structures are in the integumentary system and the digestive system involves the breakdown and absorption of food with organs such as the esophagus and stomach. The endocrine system is made of the glands that secrete hormones such as the thyroid gland and the adrenal glands. The respiratory system involves the transfer of oxygen and carbon dioxide between the air and the blood. The respiratory system consists of organs such as the trachea and lungs.

Label the organ systems underneath each illustration and label the selected organs by using the terms available. When you finish, select different colors for each organ system and color them in.

Organ System

Integumentary system Digestive system Endocrine system Respiratory system



Esophagus Thyroid gland Trachea


Stomach Adrenal glands Lungs

Skin GlandSkin Gland

Answer Key: a. Skin, b. Integumentary, c. Esophagus, d. Stomach, e. Digestive, f. Thyroid gland, g. Adrenal gland, h. Endocrine, i. Trachea, j. Lung, k. Respiratory

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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